Heat oven to 350°F. In 1-quart saucepan, melt butter. Coat bottom and sides of 12-cup fluted tube cake pan with 2 tablespoons of the melted butter; sprinkle pan with 3 tablespoons of the nuts. Add remaining nuts, brown sugar and water to remaining melted butter. Heat to boiling, stirring occasionally. Boil 1 minute, stirring constantly.